Edit Tuners Perth?

[boomer01]

Hi,

It's a good observation from Jordak, RE the comment on top-end v's bottom-end.

For example (and yes we have to make the assumption that the dynos are the same - just for arguments sake, we know they're not... just don't go there...)

I'm producing 192rwkw @ 3000rpm where as the XR6T in the Xtreme example is producing something like 110rwkw @ approx. 3000rpm

However the Xtreme dyno shows a higher max. rwkw reading of 262.9, where as my chart show's 249.2 rwkw.

So, does this mean that it's a trade off with the tuning approach for these cars? If you go for more bottom-end kilowatts, do you sacrifice top-end and v-a-v - higher top-end however less bottom-end performance?

I would think (and it's just my opinion - I have no data/stats etc. I'm just throwing it out there...) that daily driving tends to be a low rpm exercise and that's where you want the ponies??? Again horses-for-courses, some may like the higher rpm approach...

What do you think?

Regards,

Tom.

[Romulus]

Strong maximum power but the torque curve is a bit slow on the uptake as opposed to it coming on strong from say 2000rpm.

Likewise the power seems to be about 40 odd rwkw down on what you could otherwise expect @ around 3000rpm.

Seems to be the case that when you chase high maximum rwkw you sometimes compromise the available power down low which is where you do most of your driving.

Interested in others thoughts, also is it usual to use 4th gear instead of third or is this a manual vs. auto thing?

<{POST_SNAPBACK}>

Boost and AFR's would be really useful to see as well Is it making 278rwkw on 8psi or 18psi? Is it running a safe AFR of 11.5 - 11.8 or it running mid - high 12's?

Tend to agree with you Jordak, power seems to ramp up a little slow compared to others I've seen. XR6T's tent to really ramp the power up hard and fast from 3000rpm.

Edited 28/06/05 10:25 AM by M6 XR6T

[Romulus]

Found an old dyno graphs of mine making 264.8rwkw on 10psi with bigger injectors, stock intercooler, exhaust and intake. The way the power ramps up is totally different to the other XR6T dyno sheet.

Edited 28/06/05 10:23 AM by M6 XR6T

[F6_Tornado]

I have tried a couple of maps and one was like this and I didnt like it and asked for another with it down low and Simone did one that was coming on way way lower than that but it can take a little getting used to but I like it lower personaly.

With the six speed under WOT gear changes are like between 4000 to 5000/5500 so not a big drop between gears so the smart thing is to have a couple of different maps depending on what your doing at any given time!!!

From My dealing with him I find he will make it whatever you like and personally tune it to suit you and not the dyno sheet.

I thought that was what getting a Custome tune was all about?

[Xtreme F6]

what you guys are actually saying isnt really going to show in these graphs. How fast it comes on depends on where u start the run.. if you start the run at WOT, if you strat it @ 2000 or 1500 ect ect. How much slip the converter is making now with the added torque. With the xtreme T graph we couldnt load the engine up lower then 3000 , we had the dyno locked @ 2000 rpm but as soon as you went WOT the converter slipped to 3000. Had to be a progressive approach. That car ran a 12.91 @112 with a 2.3 60..

[Xtreme F6]

Found an old dyno graphs of mine making 264.8rwkw on 10psi with bigger injectors, stock intercooler, exhaust and intake. The way the power ramps up is totally different to the other XR6T dyno sheet.

shouldnt you be running your dyno runs in shoot6F??.................. The different shoot out modes change the way it ramps and thus changes the way it makes the graph look.........

Edited 28/06/05 02:00 PM by GTP-330

[Xtreme F6]

Found an old dyno graphs of mine making 264.8rwkw on 10psi with bigger injectors, stock intercooler, exhaust and intake. The way the power ramps up is totally different to the other XR6T dyno sheet.

shouldnt you be running your dyno runs in shoot6F??.................. The different shoot out modes change the way it ramps and thus changes the way it makes the graph look.........

Heres another graph of a dead stock XR6 T courier's ute, obviously the blue is stock 188rwkw then there is the tune I made for premium 230 rwkw then the ultimate 98 tune 237.

[jordak]

what you guys are actually saying isnt really going to show in these graphs. How fast it comes on depends on where u start the run.. if you start the run at WOT, if you strat it @ 2000 or 1500 ect ect. How much slip the converter is making now with the added torque.  With the xtreme T graph we couldnt load the engine up lower then 3000 , we had the dyno locked @ 2000 rpm but as soon as you went WOT the converter slipped to 3000. Had to be a progressive approach. That car ran a 12.91 @112 with a 2.3 60..

<{POST_SNAPBACK}>

Not sure I fully understand your explanation but thanks anyway.

So how do you establish what power levels are being achieved @say 2000 to 2500 rpm ? do you have other graphs that provide this info?

The tunes obviously effective if running high 12's would just like to see the fuul power delivery story

[Xtreme F6]

what you guys are actually saying isnt really going to show in these graphs. How fast it comes on depends on where u start the run.. if you start the run at WOT, if you strat it @ 2000 or 1500 ect ect. How much slip the converter is making now with the added torque.  With the xtreme T graph we couldnt load the engine up lower then 3000 , we had the dyno locked @ 2000 rpm but as soon as you went WOT the converter slipped to 3000. Had to be a progressive approach. That car ran a 12.91 @112 with a 2.3 60..

Not sure I fully understand your explanation but thanks anyway.

So how do you establish what power levels are being achieved @say 2000 to 2500 rpm ? do you have other graphs that provide this info?

The tunes obviously effective if running high 12's would just like to see the fuul power delivery story

that's the problem, the minute you ad dthe amount of torque we now have down low the car cant be started at the same point. but the cars are making ALOT more pull from 2000 up. Its not hard to do with a manual, only really the autos

[boomer01]

that's the problem, the minute you ad dthe amount of torque we now have down low the car cant be started at the same point. but the cars are making ALOT more pull from 2000 up. Its not hard to do with a manual, only really the autos

<{POST_SNAPBACK}>

Hi,

So is it a case of (and I don't know I don't tune cars....) if you tune for greater boost at lower RPM, with the intention of producing more power in the lower part of the RPM range (and I get your point about dyno runs and WOT etc. etc.) do you sacrifice top end power?

I guess what I'm asking is (and not very well ) is if you bring boost on later do you produce a higher rwkw total as compared with bringing boost on lower and producing greater rwkw's at low RPM, but maybe less overall rwkw's.

Regards,